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For hydrogen oxygen fuel cell with react...

For hydrogen oxygen fuel cell with reaction
`2H_(2)(g)+O_(2)(g) rarr 2 H_(2)O(l)`
`DeltaG_(f)^(c-)(H_(2)O)=-237.2kJ mol^(-1)`. Hence, `EMF` of the fuel cell is
1) `+2.46 V`
2) `-2.46V`
3) `+1.23 V`
4) `-1.23V`

A

`+2.4 6V`

B

`-2.46V`

C

`+1.23V`

D

`-1.23V`

Text Solution

Verified by Experts

The correct Answer is:
c
`DeltaG^(@)=-nE^(@)F`
`E^(@)=(DeltaG^(@))/(-nF)`
`=(-237.2xx10^(3))/(-2xx96500)=1.229V`
`=1.23V`
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